In the Era of the Revolution, Why Were Most of the Northern

In the era of the Revolution, why were most of the northern states willing and able to take steps to abolish slavery?

A) Founding fathers, such as Jefferson, had long intended to create a nation free of the brutalities of slavery.
B) The North had already elected a number of free blacks to political office and established a precedent for more diverse roles.
C) The total lack of free blacks who were allowed to join the American army helped the North to view free blacks as everyday people.
D) The North had far fewer slaves than the South and was moved by the American ideals of liberty and freedom.
E) The North embraced an abolitionist identity in large part because the South had considered the North more likely to abolish slavery than Great Britain.